/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.session.it;

import org.apache.iotdb.commons.conf.IoTDBConstant;
import org.apache.iotdb.isession.ISession;
import org.apache.iotdb.isession.template.Template;
import org.apache.iotdb.isession.template.TemplateNode;
import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.rpc.IoTDBConnectionException;
import org.apache.iotdb.rpc.StatementExecutionException;
import org.apache.iotdb.rpc.TSStatusCode;
import org.apache.iotdb.session.template.MeasurementNode;
import org.apache.iotdb.tsfile.file.metadata.enums.CompressionType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({ClusterIT.class})
public class IoTDBSessionSchemaTemplateIT {

    private ISession session;

    @Before
    public void setUp() throws Exception {
        System.setProperty(IoTDBConstant.IOTDB_CONF, "src/test/resources/");
        EnvFactory.getEnv().initBeforeTest();
        session = EnvFactory.getEnv().getSessionConnection();
    }

    @After
    public void tearDown() throws Exception {
        if (session != null) {
            session.close();
        }
        EnvFactory.getEnv().cleanAfterTest();
    }

    @Test
    public void testCreateFlatTemplate()
            throws IOException, StatementExecutionException, IoTDBConnectionException {
        String tempName = "flatTemplate";
        List<String> measurements = Arrays.asList("x", "y", "speed");
        List<TSDataType> dataTypes =
                Arrays.asList(TSDataType.FLOAT, TSDataType.FLOAT, TSDataType.DOUBLE);
        List<TSEncoding> encodings = Arrays.asList(TSEncoding.RLE, TSEncoding.RLE, TSEncoding.GORILLA);
        List<CompressionType> compressors =
                Arrays.asList(CompressionType.SNAPPY, CompressionType.SNAPPY, CompressionType.LZ4);

        session.setStorageGroup("root.sg");

        session.createSchemaTemplate(tempName, measurements, dataTypes, encodings, compressors, true);
        session.setSchemaTemplate("flatTemplate", "root.sg.d0");
        try {
            session.setSchemaTemplate("flatTemplate", "root.sg.d0");
            fail();
        } catch (StatementExecutionException e) {
            assertEquals(
                    TSStatusCode.METADATA_ERROR.getStatusCode() + ": Template already exists on root.sg.d0",
                    e.getMessage());
        }
    }

    @Test
    public void testShowTemplates()
            throws StatementExecutionException, IoTDBConnectionException, IOException {
        session.setStorageGroup("root.sg");

        Template temp1 = getTemplate("template1");
        Template temp2 = getTemplate("template2");

        assertEquals("[]", session.showAllTemplates().toString());

        session.createSchemaTemplate(temp1);
        session.createSchemaTemplate(temp2);

        assertEquals(
                new HashSet<>(Arrays.asList("template1", "template2")),
                new HashSet<>(session.showAllTemplates()));

        session.setSchemaTemplate("template1", "root.sg.v1");
        session.setSchemaTemplate("template1", "root.sg.v2");
        session.setSchemaTemplate("template1", "root.sg.v3");

        assertEquals(
                new HashSet<>(Arrays.asList("root.sg.v1", "root.sg.v2", "root.sg.v3")),
                new HashSet<>(session.showPathsTemplateSetOn("template1")));

        assertEquals(
                new HashSet<>(Collections.emptyList()),
                new HashSet<>(session.showPathsTemplateUsingOn("template1")));

        session.setSchemaTemplate("template2", "root.sg.v4");
        session.setSchemaTemplate("template2", "root.sg.v5");
        session.setSchemaTemplate("template2", "root.sg.v6");

        assertEquals(
                new HashSet<>(Arrays.asList("root.sg.v4", "root.sg.v5", "root.sg.v6")),
                new HashSet<>(session.showPathsTemplateSetOn("template2")));

        assertEquals(
                new HashSet<>(
                        Arrays.asList(
                                "root.sg.v1",
                                "root.sg.v2",
                                "root.sg.v3",
                                "root.sg.v4",
                                "root.sg.v5",
                                "root.sg.v6")),
                new HashSet<>(session.showPathsTemplateSetOn("*")));

        session.insertRecord(
                "root.sg.v1.GPS",
                110L,
                Collections.singletonList("x"),
                Collections.singletonList(TSDataType.FLOAT),
                Collections.singletonList(1.0f));

        assertEquals(
                new HashSet<>(Collections.singletonList("root.sg.v1.GPS")),
                new HashSet<>(session.showPathsTemplateUsingOn("template1")));

        session.insertRecord(
                "root.sg.v5.GPS",
                110L,
                Collections.singletonList("x"),
                Collections.singletonList(TSDataType.FLOAT),
                Collections.singletonList(1.0f));

        assertEquals(
                new HashSet<>(Collections.singletonList("root.sg.v1.GPS")),
                new HashSet<>(session.showPathsTemplateUsingOn("template1")));

        assertEquals(
                new HashSet<>(Collections.singletonList("root.sg.v5.GPS")),
                new HashSet<>(session.showPathsTemplateUsingOn("template2")));
    }

    @Test
    public void testDropTemplate()
            throws StatementExecutionException, IoTDBConnectionException, IOException {
        session.setStorageGroup("root.sg");

        Template temp1 = getTemplate("template1");

        assertEquals("[]", session.showAllTemplates().toString());

        session.createSchemaTemplate(temp1);

        assertEquals("[]", session.showPathsTemplateSetOn("template1").toString());

        try {
            session.createSchemaTemplate(temp1);
            fail();
        } catch (Exception e) {
            assertEquals(
                    TSStatusCode.METADATA_ERROR.getStatusCode() + ": Duplicated template name: template1",
                    e.getMessage());
        }

        session.dropSchemaTemplate("template1");
        session.createSchemaTemplate(temp1);

        session.setSchemaTemplate("template1", "root.sg.v1");

        try {
            session.dropSchemaTemplate("template1");
            fail();
        } catch (Exception e) {
            assertEquals(
                    TSStatusCode.METADATA_ERROR.getStatusCode()
                            + ": Template [template1] has been set on MTree, cannot be dropped now.",
                    e.getMessage());
        }

        session.unsetSchemaTemplate("root.sg.v1", "template1");
        session.dropSchemaTemplate("template1");

        session.createSchemaTemplate(temp1);
    }

    private Template getTemplate(String name) throws StatementExecutionException {
        Template sessionTemplate = new Template(name, false);

        TemplateNode mNodeX =
                new MeasurementNode("x", TSDataType.FLOAT, TSEncoding.RLE, CompressionType.SNAPPY);
        TemplateNode mNodeY =
                new MeasurementNode("y", TSDataType.FLOAT, TSEncoding.RLE, CompressionType.SNAPPY);

        sessionTemplate.addToTemplate(mNodeX);
        sessionTemplate.addToTemplate(mNodeY);

        return sessionTemplate;
    }
}
